Tulipversion 2.0.1 released

This is a new release, newfeatures, fix of several bugs, some memory optimization.

details : Lib tulip: Bug inMutable container have been removed (thanks to Jeremy Compostella),memory optimization have been done in MutableContainerLibtulip-ogl: Code cleaning, code refactoringPlugins: Newbiconnected component decomposition plug-inTulip Software: AMessageBox is now displayed when someone wants to exit without saving,fix several bugs.General : All the library, plugin andsoftware have been change in order to compile on windows and on gcc-3.4(Thanks Loic Jezequel and Daniel Archambault)